Answer Posted / rico

The basic difference is in the time of checking the
condition during execution of loop. In while loop the
condition is checked at the start, if it is true then
statements enclosed in the loop structure are executed ,
otherwise the loop exits and control transfers to the
statements following this loop and this process continues
until the condition becomes false.
As:
While (condition)
{
statement1;
statement2;
.
.
}
Statements following the loop


But in the case of do-while loop condition is checked at
the end of structure (i.e., at least one time the
statements enclosed in this loop structure are executed
before checking the condition)
After executing the loop statements at least once, the loop
condition is checked; if it is true then the loop body is
executed again otherwise loop exits. As:
Do
{
statement1;
statement2;
.
.
}
While (condition)
Statements following the loop

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